NYC-WTC_000230326

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 6673 Filter Type / Filter Area: MCE 385 mnV Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496

GRID BOX: Magnification; 20,0.00 GRID ID: Accelerating Voltage: 100 KeV j # Grid Openings: 4 Analysis Date: 2/14/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type' Length ID of Structure NorN EDS No >=05 p : '=5p (Nonadb F B C M Chrys Amphibole ■ Nonasb Ambig/ND No Coord <5m Elements)

Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overtapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile j AMPHIBOLES ! Amphibole F = Single Fiber Amosite [ B = Bundle (<3 fibers <1 fiber diameter apart ! Crocidolite I Ambiguous C = Cluster (>3 Intersections) Anthophyllite i Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = Mo Structures Detected

CONFIDENTIAL, CITY_21MC100_003389071 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230326